Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9eebfad858fe06f…

MALICIOUS

PDF

80.5 KB Created: 2021-03-28 16:02:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1e3c57a221f8f33ac263d3d0bc7d67f6 SHA-1: d47595ad72aac272eb689d01f45518bccac17952 SHA-256: f9eebfad858fe06fafc689ff18269b6556e92bf1185da43c321128b615aa8875
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs and the PDF's structure suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://mezovuduw.ru/strik?utm_term=nordstrom+employee+policy+manual PDF link annotation
    • http://hiziryigit.online/xemodavirdkcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403537/normal_602252df216d4.pdfIn PDF document text
    • http://prizinsta24.space/baixar_jogos_infantil_gratis_para_androidsk8yh.pdfIn PDF document text
    • http://opensol.xyz/nejiricod18.pdfIn PDF document text
    • http://shimano-stradic.ru/masterminds_4th_bookvbmfx.pdfIn PDF document text
    • http://jsexj.fun/tiger_cub_badge_requirements_spreadsheet6zppk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443824/normal_600f3bfe63125.pdfIn PDF document text
    • http://bit7.top/sosorubasipuniposutisewii46.pdfIn PDF document text
    • http://sallehub.xyz/7279406980326r0x.pdfIn PDF document text
    • http://mosquito.codes/26586804437xyype.pdfIn PDF document text
    • http://tryraisins.pro/39442785397q2zcb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_ef79e1e32e5642bd8c084f5e566ce323.pdf?index=trueIn PDF document text
    • https://73808e0e-d5df-4584-b63e-1552d949bc0c.filesusr.com/ugd/8d2ea6_8620e6672d024829bfa5eb42ddb254e1.pdf?index=trueIn PDF document text
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_eeb95640291341bd88823b04bfeebdc2.pdf?index=trueIn PDF document text
    • http://sasinazubusun.epizy.com/conflict_minerals_reporting_for_private_companies.pdfIn PDF document text
    • https://691dfa98-c543-4342-b77d-a3d7fbf094aa.filesusr.com/ugd/d55835_e68a40cb792441f29bb7c39e211af3f6.pdf?index=trueIn PDF document text
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_bfb122b5346e47a0a17c5c776cec5357.pdf?index=trueIn PDF document text
    • https://a765b249-d442-4b07-8ea9-8318d996b894.filesusr.com/ugd/902d29_47d2379ad61b415180569c18c12f46d9.pdf?index=trueIn PDF document text
    • https://c3e810f9-371e-40b9-9a0b-4695a496ec77.filesusr.com/ugd/2c7c49_c31143c473f04bbe8f046fc2b09417c8.pdf?index=trueIn PDF document text
    • https://ed457e25-7262-4bf7-b769-9a3df1da8a49.filesusr.com/ugd/60ac0c_0d8c45c7e71f4755ab8d7086d4be8536.pdf?index=trueIn PDF document text
    • http://ditaloted.epizy.com/a_death_in_the_family_interactive_movie.pdfIn PDF document text
    • http://sosozodazu.epizy.com/fagosolowakenoxumom.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD2 5288 bytes
SHA-256: ecc6a84a174aa38b12b528739490ac57764ee6debc7ed5e76ce291606cdea2a1
font_01_sfnt_off00010cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC3 11004 bytes
SHA-256: eda0d3515f92a3bd6b5ef88bfbaf60aa46d417c3a358a58a1975c87d21ae47c9